/Engine/Plugins/Web/HttpBlueprint/Source/HttpBlueprint/Public/HttpHeader.h
Sets the internal headers. Will overwrite any headers already in the map
[FHttpHeader](API\Plugins\HttpBlueprint\FHttpHeader) SetHeaders ( const [TMap](API\Runtime\Core\Containers\TMap)< [FString](API\Runtime\Core\Containers\FString), [FString](API\Runtime\Core\Containers\FString) > & NewHeaders )